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21-08-2013, 06:49 PM #1
Compressor shaking after air conditioner shutting down
hi
i received an old LG heatpump split ac unit
that had leakage because of cracked capillary tube
i cut 1 cm of the capillary then i weld it
made vacuum for 30 minutes then
charged it by weight
and it cool very good
problem is that when i shutting down them unit
compressor keep shaking for sometimes
30 seconds
5 seconds
and sometimes not
what is the problem or that is ok
in this video compressor shake up for 3 second only
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21-08-2013, 08:27 PM #2
- Join Date
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Re: Compressor shaking after air conditioner shutting down
Refrigerant is expanding from high pressure side and turns motor backward until pressure equalize. Faulty (stuck) discharge valve at high side.
Last edited by nike123; 21-08-2013 at 08:41 PM.
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21-08-2013, 09:05 PM #3
Re: Compressor shaking after air conditioner shutting down
http://www.ra.danfoss.com/TechnicalI...A5.02%20vs.pdf
fit another non return valve on the discharge line- stop the rattlin and prevent pipe fracturing
make sure u fit it the correct way round
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21-08-2013, 09:10 PM #4
Re: Compressor shaking after air conditioner shutting down
ok
if i left the unit working at this way
what will happen except rattlin & pipe fracturing
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21-08-2013, 09:11 PM #5
Re: Compressor shaking after air conditioner shutting down
more repairs, and more posts on here!
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25-09-2013, 08:11 PM #6
Re: Compressor shaking after air conditioner shutting down
ok
the solution installing discharge line check valve
thank u all